caa a22 4500 465791743 CHVBK 20180323112026.0 cr unu---uuuuu 170327e19901001xx s 000 0 eng 10.1007/BF00302494 doi (NATIONALLICENCE)springer-10.1007/BF00302494 Trace element crystal chemistry of mantle eclogites [Elektronische Daten] [Florie Caporuscio, Joseph Smyth] Rare earth element (REE) concentrations have been measured using instrumental neutron activation analysis on clean separates of primary minerals from 11 eclogite samples from the Bobbejaan and Roberts Victor kimberlites, South Africa. Samples were selected to reflect minimal secondary alteration and represent a broad range of eclogite compositions from coesiteand corundum-grospydites through magnesian bimineralic eclogites. Correlations between REE concentrations and major-element compositions suggest that garnet and clinopyroxene crystal chemistry are the dominant control on REE distribution and that these approach solidstate equilibrium distributions. Reconstructed wholerock REE concentration variation with whole-rock major-element compositions are consistent with an origin by high-pressure igneous fractionation followed by reequilibration to lower temperatures at pressures in excess of three GPa. Springer-Verlag, 1990 Caporuscio Florie Department of Geological Sciences, University of Colorado, 80309-0250, Boulder, CO, USA aut Smyth Joseph Department of Geological Sciences, University of Colorado, 80309-0250, Boulder, CO, USA aut Contributions to Mineralogy and Petrology Springer-Verlag 105/5(1990-10-01), 550-561 0010-7999 105:5<550 1990 105 410 https://doi.org/10.1007/BF00302494 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00302494 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Caporuscio Florie Department of Geological Sciences, University of Colorado, 80309-0250, Boulder, CO, USA aut NATIONALLICENCE 700 1- Smyth Joseph Department of Geological Sciences, University of Colorado, 80309-0250, Boulder, CO, USA aut NATIONALLICENCE 773 0- Contributions to Mineralogy and Petrology Springer-Verlag 105/5(1990-10-01), 550-561 0010-7999 105:5<550 1990 105 410 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer